Mailsnail MCP Server

Mailsnail is an MCP integration. Send USPS letters, postcards & certified mail from any agent. No signup; pay-per-piece via Stripe.

Packages and local setup

The published npm package is mailsnail, version 0.6.0. Its declared MCP transport is stdio.

The package declares MAIL_PROVIDER (required): Where to mail from: 'managed' (default, no signup, pay-per-piece via Stripe), 'click2mail' (BYO account), or 'lob' (BYO key).; MAIL_API_BASE_URL: Hosted Mailsnail backend. Required when MAIL_PROVIDER=managed.; CLICK2MAIL_USERNAME: Click2Mail account username. Required when MAIL_PROVIDER=click2mail.; CLICK2MAIL_PASSWORD: Click2Mail account password. Required when MAIL_PROVIDER=click2mail.; LOB_API_KEY: Lob API key. Required when MAIL_PROVIDER=lob. test_ is free; live_ actually mails.; MAIL_MCP_ALLOW_LIVE: Set to '1' to actually mail in BYOK modes. Default '0' is dry-run.; MAIL_MCP_SPEND_CAP_USD: Per-session estimated spend cap. Server refuses sends past this..

Before connecting

Check the maintainer’s instructions for account access, authentication and the supported client configuration. Once connected, inspect the tools your client receives and try a small task that matches the server’s stated purpose. The registry description does not include a verified, complete tool list.

Project and source

View the publisher’s registry entry · Project repository · Project website. This profile uses version 0.6.0 from the registry. Registration identifies the publisher namespace; it does not establish that this is a first-party integration for every service it connects.

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